Lac Vingt et Un is a Lake located in Lac-au-Brochet; La Haute-Côte-Nord, Quebec and has an elevation of 317 meters.

• Latitude: 48° 58' 24'' North   (decimal: 48.9733685)
• Longitude: 69° 5' 48'' West   (decimal: -69.0967170)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 317 meters
• Location: Lac-au-Brochet; La Haute-Côte-Nord
• Atlas of Canada Locator Map: Lac Vingt et Un
• GPS Coordinate Locator Map: Lac Vingt et Un Lat/Long